How to protect the high-pressure pipe blasting of coal mine feng shui pipe

Evacuate the workers and cut off the power. According to China's trip to official website. Com, under any circumstances, it is forbidden to stop the wind and cut off the power. When the wind stops and power is cut off due to maintenance or other reasons, the workers must be evacuated, the power supply must be cut off, and a fence warning sign should be set up in the alley leading to the air return outlet. Before the ventilation is restored, the gas condition must be checked. Only when the gas concentration in the airflow near the fan and switch 10 meter does not exceed 0.5% can it be started. When the gas is exhausted,